How to model a curved book page?
Quite nice result with Cloth Sim + Empty

Under Physics Properties Enable Cloth Simulation, Preset &gt; Rubber &gt; Vertex Mass decrease to 0.3 kg
Create two Vertex Groups, one for Pinning second to Hook Empty

Pinning - select left two line of vertices + right-down vertex, add a new group and assign. Select second line of vertices and lower weight to 0.5



Hook - for this vertex group select only right-down vertex, add a new vertex group and assign


Snap cursor to Selected (Shift+S), go to object mode and add Empty.
Select page and add Hook modifier above Cloth with Object &gt; Empty, Vertex Group &gt; Hook. As a last moodier add Subdivision (with border vertices selected press Shift+E+1 (Crease) to keep sharp edge shapes of page.



Tip: to affect curvature at book binding slide second edge more left or right or add one more edge loop ...